CN111553007A - Method for automatically generating geometric working conditions in two-dimensional calculation profile of side slope - Google Patents
Method for automatically generating geometric working conditions in two-dimensional calculation profile of side slope Download PDFInfo
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Abstract
A method for automatically generating geometric working conditions in a two-dimensional slope calculation profile comprises the following steps: acquiring a two-dimensional slope surface line object through a slope three-dimensional geological model, and managing the slope two-dimensional slope surface line object according to an object tree; managing each geological object on the object tree according to the object type and the name, and simultaneously acquiring attribute information corresponding to each geological object; according to actual engineering requirements, carrying out corresponding combination and collocation on each geological object in the object tree; defining a rectangular frame representing the slope calculation section range; cutting and sealing the section line object and the rectangular frame; and repeating all the steps, and generating corresponding different geometrical working conditions according to different combination and collocation of each geological object in the object tree. The invention can randomly match a plurality of influence factors of the side slope, can combine to form various working conditions meeting the actual requirements to simulate the engineering geological conditions of the side slope, reduces repeated creation work and greatly improves the efficiency.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a method for automatically generating multiple geometrical working conditions in a two-dimensional slope calculation profile.
Background
The side slope is a slope formed naturally or artificially, is one of the most basic geological environments in human engineering activities, and is also one of the most common engineering forms in engineering construction. Whether the slope is stable or not is directly related to the stability and the suitability of an engineering site, and is a project needing key verification in the reconnaissance design process, the stability of a natural slope needs to be verified in actual work, and sometimes the stability of the slope after excavation needs to be calculated, so that the safety in the construction period and the normal use process is ensured. Slope stability is a comprehensive problem, and the factors influencing the slope stability are numerous, including: landform (slope height, slope), stratum lithology (rock mass, soil mass), structural plane (fracture, advantage joint group), groundwater (water level buried depth), design reinforcement measures and the like.
When the slope stability is calculated, the influence factors need to be fully demonstrated, and the selection are carried out according to actual conditions, such as natural topography or excavation topography, different structural surface control, rock and soil body saturation or dryness, slope working conditions represented by slope reinforcement measures and the like are completely different, and the calculation results are also different. A plurality of working conditions are formed by combining a plurality of factors, and the current solution for calculating the plurality of working conditions of the side slope is as follows: and (4) creating a plurality of files, respectively importing the geometric figure files representing corresponding working conditions, respectively carrying out geological attribute assignment, and finally carrying out slope stability calculation.
The current realization process is very complicated, the operation is needed once for each working condition, a large amount of repeated work exists in the middle, the work efficiency is reduced, and the error probability of the process is increased.
Disclosure of Invention
In view of the above, the present invention has been made to provide a solution to the above problems or to at least partially solve the above problems.
The technical scheme provided by the invention is as follows:
a method for automatically generating geometric working conditions in a two-dimensional slope calculation profile comprises the following steps:
s100, acquiring a side slope three-dimensional geological model, carrying out sectioning treatment on the geological three-dimensional model to obtain a side slope two-dimensional section, obtaining a side slope two-dimensional slope surface line object according to the side slope two-dimensional section, and managing the side slope two-dimensional slope surface line object according to an object tree;
s200, managing each geological object on the object tree according to the object type and the name, and simultaneously acquiring attribute information corresponding to each geological object;
s300, according to actual engineering requirements, corresponding combination and collocation are carried out on each geological object in the object tree, and meanwhile, corresponding geological attribute values are attached to the profile line objects.
S400, defining a rectangular frame representing a slope calculation section range, and if the rectangular frame exceeds a geological object, automatically extending the rectangular frame until the rectangular frame exceeds the rectangular range so as to facilitate cutting;
s500, cutting and sealing the space between the section line object and the rectangular frame to form individual sealed filling areas, wherein the sealed filling areas represent the current geometric working conditions;
s600, repeating S300-S500, and generating corresponding different geometrical working conditions according to different combination and collocation of each geological object in the object tree.
Further, the S100 specifically includes:
a method of converting a three-dimensional geological model of a slope into a two-dimensional computed slope comprising:
s101, obtaining a side slope three-dimensional geological model, wherein the side slope three-dimensional geological model comprises a ground surface, a stratum bottom surface and a side slope excavation surface;
s102, carrying out attribute assignment on the geological surface of the three-dimensional geological model of the side slope, and transmitting the current surface attribute to the grid node of the corresponding surface;
s103, establishing a section line, obtaining a vertical plane equation where the section line is located according to the section line coordinate, and obtaining the maximum and minimum elevation values of all grid surface nodes in the current three-dimensional model;
s104, constructing a space cube to retrieve the triangular mesh of a certain face object in the side slope model, and deleting the triangular mesh according to a preset rule to obtain a new mesh face of the face object;
s105, intersection calculation is carried out on the triangular mesh and the section of the new mesh surface to obtain coordinates of all intersection points of the mesh surface and the section, intersection lines of the mesh surface and the section can be obtained by sequentially connecting the intersection points, meanwhile, the attribute of the current triangular mesh node is also transmitted to the intersection points, and all the intersection points are attached with attribute data of the current object;
s106, extracting all intersection point coordinates and coordinates of a section line end point of the current object, converting an intersection point coordinate z into y, converting the distance between the intersection point coordinate z and the section line end point in the horizontal direction into x, drawing a line segment on a two-dimensional section through the converted coordinates, and simultaneously transmitting an attribute value of an intersection point to the line segment;
and S107, repeating the steps of S104-S106 on the other faces of the three-dimensional geological model of the side slope, and creating and generating a two-dimensional calculation section of the side slope.
Further, in S104, the method for constructing the space cube includes: traversing all mesh surfaces in the three-dimensional model to obtain the maximum side length d of the triangular meshmaxThen, the section in S103 is translated forward and backward along the vertical direction, and the translation distance can be set as dmax+1, obtaining another two vertical plane equations P1 and P2 parallel to the section, and obtaining two horizontal planes according to the minimum elevation value and the maximum elevation value: g1, G2, a space cube was obtained by P1, P2, G1, G2.
Further, the three-dimensional geological model of the side slope has all geological objects capable of influencing the stability of the side slope, and at least comprises the following steps: : and (3) designing reinforcement measures for landforms, stratum lithology, structural surfaces and underground water.
Further, the two-dimensional slope surface line object of the side slope comprises terrain, stratum lithology, underground water level, fracture, advantageous joint group and design support measures.
Furthermore, the landform is a natural landform and an excavation landform, the lithology of the stratum is divided according to the lithology type of the stratum which is actually exposed, the underground water level is divided into a rich water level, a flat water level, an initial water level, a final hole stable water level and a rainstorm working condition water level, the fracture and dominance joint group is divided according to the number of the groups which are actually exposed, and the design of supporting measures can be divided into soil nails, anchor cables and lattice beams.
Further, the geological object attribute information at least comprises cohesive force, internal friction angle and volume weight.
Further, each of the closed packed regions represents a rock-soil layer and has a geological property value corresponding to the lithology of the stratum.
Furthermore, the actual engineering requirements at least comprise the working conditions of the natural side slope under the rainstorm working condition, the natural side slope, the rainstorm working condition and the system support completion working condition.
Compared with the prior art, the invention has the following beneficial effects: the invention provides a method for automatically generating various geometric working conditions in a two-dimensional calculation profile of a side slope, which can randomly match a plurality of influence factors of the side slope, can combine to form various working conditions meeting actual requirements to simulate the engineering geological conditions of the side slope, reduces repeated creation work and greatly improves the efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method for automatically generating various geometric conditions in a two-dimensional slope calculation profile according to embodiment 1 of the present invention;
FIG. 2 is a diagram of a natural slope working condition structure created in embodiment 1 of the present invention;
fig. 3 is a structural diagram of the working condition of the excavated slope created in embodiment 1 of the present invention.
Detailed Description
Example 1
The embodiment discloses a method for automatically generating geometric working conditions in a two-dimensional slope calculation profile, which comprises the following steps:
s100, acquiring a side slope three-dimensional geological model, carrying out sectioning treatment on the geological three-dimensional model to obtain a side slope two-dimensional section, obtaining a side slope two-dimensional slope surface line object according to the side slope two-dimensional section, and managing the side slope two-dimensional slope surface line object according to an object tree;
specifically, the S100 specifically includes:
s101, obtaining a side slope three-dimensional geological model, wherein the side slope three-dimensional geological model comprises a ground surface, a stratum bottom surface and a side slope excavation surface;
the three-dimensional geological model can be constructed by technicians through three-dimensional modeling software on the basis of actual geological data, and can also be directly imported from the outside, and the three-dimensional geological model is not limited herein
S102, carrying out attribute assignment on the geological surface of the three-dimensional geological model of the side slope, and transmitting the current surface attribute to the grid node of the corresponding surface;
in the embodiment, the geological surface comprises the lithology of the stratum, the fault and the like, and the attribute assignment of the geological surface comprises cohesive force, internal friction angle, volume weight and the like. The attribute assignments vary from one geologic surface to another.
S103, establishing a section line, obtaining a vertical plane equation where the section line is located according to the slope line coordinates, and obtaining the maximum and minimum elevation values of all grid surface nodes in the current three-dimensional model;
specifically, a line segment can be arbitrarily drawn in the model display window, or an existing exploration line can be directly imported as a section line, and since the coordinates of the section line are known, the equation of a vertical plane where the section line is located can be expressed as P0: ax + By + C is 0, zmin≤z≤zmaxThe value ranges of x and y are the range values of the line segment end points, zmin、zmaxThe maximum and minimum elevation values of all the grid surface nodes in the three-dimensional model can be picked.
S104, constructing a space cube to retrieve the triangular mesh of a certain face object in the side slope model, and deleting the triangular mesh according to a preset rule to obtain a new mesh face of the face object;
specifically, the method for constructing the space cube comprises the following steps: traversing all mesh surfaces in the three-dimensional model to obtain the maximum side length d of the triangular meshmaxThen, the section in the second step is translated forwards and backwards along the vertical direction, and the translation distance can be set as dmax+1, get another two vertical plane equations P parallel to the section plane1、P2Also according to zmin、zmaxTwo levels can be obtained: g1、G2Through P1、P2、G1、G2A space cube can be rendered.
The method for deleting the triangular mesh according to the preset rule to obtain the new mesh surface of the surface object comprises the following steps: and searching the triangular mesh of a certain surface object in the slope model through the cubic range, recording the numbers of the triangular mesh if and only if three nodes in the triangular mesh fall into the cubic range, summarizing and storing the numbers, and drawing a new mesh surface of the surface object, wherein the new mesh surface is the cut mesh surface.
S105, intersection calculation is carried out on the triangular mesh and the section of the new mesh surface to obtain coordinates of all intersection points of the mesh surface and the section, intersection lines of the mesh surface and the section can be obtained by sequentially connecting the intersection points, meanwhile, the attribute of the current triangular mesh node is also transmitted to the intersection points, and all the intersection points are attached with attribute data of the current object;
specifically, intersection calculation is performed on a triangular mesh of an object new mesh surface and a profile, and the coordinates of nodes of the triangular mesh of the object new mesh surface: a1 (x)1,y1,z1)、A2(x2,y2,z2)、A3(x3,y3,z3) Intersection point coordinates: j1 (x)1+λ(x2-x1),y1+λ(y2-y1),z1+λ(z2-z1))、J2(x3+β(x2-x3),y3+β(y2-y3),z3+β(z2-z3) Substituting the coordinates into the section equation to solve the coordinates of J1 and J2, performing the above operation on each triangular mesh of the new mesh surface of the object to obtain all the coordinates of the intersection points of the mesh surface and the section, sequentially connecting the intersection points to obtain the intersection line of the mesh surface and the section, and repeating the above operation on other surface objects.
S106, extracting all intersection point coordinates and coordinates of a section line end point of the current object, converting an intersection point coordinate z into y, converting the distance between the intersection point coordinate z and the section line end point in the horizontal direction into x, drawing a line segment on a two-dimensional section through the converted coordinates, and simultaneously transmitting an attribute value of an intersection point to the line segment;
and S107, repeating the steps S103-S106 on the other faces of the three-dimensional geological model of the side slope, and creating and generating a two-dimensional calculation section of the side slope. Through the steps, the conversion from the three-dimensional surface object to the two-dimensional line segment is completed, the earth surface line, the excavation line and the geological line are drawn, and meanwhile, the geological line carries the attribute value of the geological surface. And through the steps of S101-S107, obtaining a side slope two-dimensional slope surface line object from the side slope three-dimensional geological model.
In some preferred embodiments, the three-dimensional geological model of the slope has all geological objects capable of affecting the stability of the slope, including at least: and (3) designing reinforcement measures for landforms, stratum lithology, structural surfaces and underground water.
S200, each geological object on the object tree is managed according to the object type and the name, and attribute information corresponding to each geological object is obtained at the same time.
In some embodiments, the slope two-dimensional slope line objects include "terrain", "stratigraphic lithology", "water table", "fracture", "dominance joint group", "design support measures".
Specifically, the topography is natural topography and excavation topography, the lithology of stratum is divided according to the lithology type of stratum that actually exposes, and ground water level divide into rich water level, flat water level, initial water level, final bore stable water level, torrential rain operating mode water level, and fracture and advantage joint group divide according to the group number that actually exposes, and design supporting measure then can divide into soil nail, anchor rope, lattice beam.
S300, according to actual engineering requirements, corresponding combination and collocation are carried out on each geological object in the object tree, and meanwhile, corresponding geological attribute values are attached to the profile line objects.
Specifically, for example, the slope stability of the natural slope under the rainstorm condition is represented by combining and calculating the natural terrain and the rainstorm condition, and if a support measure is selected, the slope stability represents the natural slope, the rainstorm condition and the slope stability after the system support is completed, and so on, after the matching is completed, the selected geological object is displayed, the non-selected geological object is hidden, and meanwhile, the geological attribute value is required to be attached to the profile line object.
And S400, defining a rectangular frame representing the slope calculation section range, and if the rectangular frame exceeds the geological object, automatically extending the rectangular frame until the rectangular frame exceeds the rectangular range so as to cut.
S500, cutting and sealing the space between the section line object and the rectangular frame to form individual sealed filling areas, wherein the sealed filling areas represent the current geometric working conditions; and (4) storing the current combination collocation, cutting and sealing between a line object representing terrain and stratum lithology in the geological object and the rectangular square frame to form sealed filling areas, wherein each area represents a rock-soil layer and is provided with a geological attribute value of the corresponding stratum lithology. A slope representing a specific geological condition is constructed, namely a geometric working condition is created and completed.
S600, repeating S300-S500, and generating corresponding different geometrical working conditions according to different combination and collocation of each geological object in the object tree. It can be understood that different engineering conditions can be obtained through different collocation of S300, and slope stability computing environments under different environments are constructed.
The embodiment provides a method for automatically generating various geometric working conditions in a two-dimensional calculation profile of a side slope, which can randomly collocate a plurality of influence factors of the side slope, can combine to form various working conditions meeting actual requirements to simulate the engineering geological conditions of the side slope, reduces repeated creation work, and greatly improves efficiency.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a non-exclusive "or".
Claims (9)
1. A method for automatically generating geometric working conditions in a two-dimensional calculation profile of a slope is characterized by comprising the following steps:
s100, acquiring a side slope three-dimensional geological model, carrying out sectioning treatment on the geological three-dimensional model to obtain a side slope two-dimensional section, obtaining a side slope two-dimensional slope surface line object according to the side slope two-dimensional section, and managing the side slope two-dimensional slope surface line object according to an object tree;
s200, managing each geological object on the object tree according to the object type and the name, and simultaneously acquiring attribute information corresponding to each geological object;
s300, according to actual engineering requirements, carrying out corresponding combination and collocation on each geological object in the object tree, and meanwhile, attaching corresponding geological attribute values to the profile line object;
s400, defining a rectangular frame representing a slope calculation section range, and if the rectangular frame exceeds a geological object, automatically extending the rectangular frame until the rectangular frame exceeds the rectangular range so as to facilitate cutting;
s500, cutting and sealing the space between the section line object and the rectangular frame to form individual sealed filling areas, wherein the sealed filling areas represent the current geometric working conditions;
s600, repeating S300-S500, and generating corresponding different geometrical working conditions according to different combination and collocation of each geological object in the object tree.
2. The method for automatically generating geometric conditions in a two-dimensional slope calculation profile according to claim 1, wherein the S100 specifically includes:
s101, obtaining a side slope three-dimensional geological model, wherein the side slope three-dimensional geological model comprises a ground surface, a stratum bottom surface and a side slope excavation surface;
s102, carrying out attribute assignment on the geological surface of the three-dimensional geological model of the side slope, and transmitting the current surface attribute to the grid node of the corresponding surface;
s103, establishing a section line, obtaining a vertical plane equation where the section line is located according to the slope line coordinates, and obtaining the maximum and minimum elevation values of all grid surface nodes in the current three-dimensional model;
s104, constructing a space cube to retrieve the triangular mesh of a certain face object in the side slope model, and deleting the triangular mesh according to a preset rule to obtain a new mesh face of the face object;
s105, intersection calculation is carried out on the triangular mesh and the section of the new mesh surface to obtain coordinates of all intersection points of the mesh surface and the section, intersection lines of the mesh surface and the section can be obtained by sequentially connecting the intersection points, meanwhile, the attribute of the current triangular mesh node is also transmitted to the intersection points, and all the intersection points are attached with attribute data of the current object;
s106, extracting all intersection point coordinates and coordinates of a section line end point of the current object, converting an intersection point coordinate z into y, converting the distance between the intersection point coordinate z and the section line end point in the horizontal direction into x, drawing a line segment on a two-dimensional section through the converted coordinates, and simultaneously transmitting an attribute value of an intersection point to the line segment;
and S107, repeating the steps of S200-S600 on the other faces of the three-dimensional geological model of the side slope in an object-like manner, and creating and generating a two-dimensional calculation section of the side slope.
3. The method for automatically generating geometric conditions in a two-dimensional slope calculation profile according to claim 2, wherein in S104, the method for constructing the space cube is as follows: traversing all mesh surfaces in the three-dimensional model to obtain the maximum side length d of the triangular meshmaxThen, the section in S300 is translated forward and backward along the vertical direction, and the translation distance can be set as dmax+1, obtaining another two vertical plane equations P1 and P2 parallel to the section, and obtaining two horizontal planes according to the minimum elevation value and the maximum elevation value: g1, G2, a space cube was obtained by P1, P2, G1, G2.
4. The method of claim 1, wherein the three-dimensional geological model of the slope has all geological objects that can affect the stability of the slope, and comprises at least: : and (3) designing reinforcement measures for landforms, stratum lithology, structural surfaces and underground water.
5. The method of claim 1, wherein the slope two-dimensional slope surface line objects include "terrain", "stratigraphic lithology", "ground water level", "fracture", "dominance joint group", "design support measures".
6. The method of claim 4, wherein the topography is a natural topography and an excavated topography, the lithology of the stratum is divided according to the lithology type of the stratum actually revealed, the groundwater level is divided into a rich water level, a flat water level, an initial water level, a final hole stable water level and a rainstorm condition water level, the fracture and dominance joint groups are divided according to the number of the groups actually revealed, and the design support measures are divided into soil nails, anchor cables and lattice beams.
7. The method of claim 1, wherein the geological object attribute information at least comprises cohesion, internal friction angle, volume weight.
8. The method for automatically generating geometric conditions in a two-dimensional computed section of a slope according to claim 1, wherein the closed packed areas each represent a layer of rock and soil with geological property values corresponding to the lithology of the stratum.
9. The method of claim 1, wherein the actual engineering requirements include at least natural side slope in heavy rain, natural side slope, heavy rain, and system support completion.
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